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Volume 38 Issue 12
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QIN Bing, LU Yang, ZHANG Fa-zhong, CHEN Zheng-han, LIU Yue-miao, WANG Ju. Gas permeability of compacted bentonite considering Klinkenberg effect[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(12): 2194-2202. DOI: 10.11779/CJGE201612007
Citation: QIN Bing, LU Yang, ZHANG Fa-zhong, CHEN Zheng-han, LIU Yue-miao, WANG Ju. Gas permeability of compacted bentonite considering Klinkenberg effect[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(12): 2194-2202. DOI: 10.11779/CJGE201612007
shu

Gas permeability of compacted bentonite considering Klinkenberg effect

  • 1. Department of Architecture and Environmental Engineering, Logistical Engineering University, Chongqing 401311, China;
    2. Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, China;
    3. Beijing Research Institute of Uranium Geology, Beijing 100029, China

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  • Received Date: October 09, 2015
  • Published Date: December 24, 2016
    Graphical Abstract
    • Abstract
  • The gas permeability of compacted GMZ bentonite is studied using the triaxial gas permeameter. It is found that the Klinkenberg effect exists when the gas permeability is lower than 10-14 m2. A power relationship is observed between the Klinkenberg slippage factor and the ratio of the Klinkenberg permeability to the air-filled porosity. The relationship is independent on dry density and water content, and is almost identical with the Klinkenberg model. In the double-log scales, there is a linear relationship between the Klinkenberg permeability and the air-filled porosity, of which the slope is almost independent on water content. Based on the test results, a model for unsaturated gas permeability is proposed, in which the Klinkenberg effect is taken into account.
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    • References (39)
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